Product Overview
18-Lead Through-Hole IC for Legacy Board Repair and Circuit Restoration
Condition
New old stock (NOS). Unused surplus with straight through-hole leads. Evaluation: Visual inspection only. Function testing not performed. Markings legible: SIGMA RCO 29G21. Sold each.
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Product Overview
Molded in a standard 18-pin dual in-line package, the SIGMA RCO 29G21 provides through-hole circuit mounting for specialized electronic assemblies. With dual rows of nine pins and a classic indexing notch for orientation, this legacy component matches dedicated board layouts requiring exact part number 29G21.
Key Features
- Form Factor: 18-pin dual in-line package (DIP-18)
- Mounting Type: Through-hole technology (THT)
- Lead Configuration: Two parallel rows of 9 leads
- Housing Construction: Molded black epoxy encapsulation
- Orientation Marker: End notch for pin 1 identification
- Body Markings: SIGMA RCO 29G21
Applications
- Component-level replacement on legacy industrial control and instrumentation boards requiring part number 29G21
- Bench repair and restoration of vintage electronics utilizing proprietary DIP-18 integrated circuits
- Prototyping and breadboard experimentation on standard 0.1-inch grid through-hole sockets
Frequently Asked Questions
What package style does this component use?
This component is housed in a standard 18-pin dual in-line package (DIP-18) with through-hole pins suited for PCB soldering or standard 18-pin DIP sockets.
What is the pinout or internal logic of this chip?
The internal logic and pinout are proprietary to the 29G21 part number. Buyers should match this exact part number to their board schematic or replacement bill of materials.
What condition is this component in, and what should I expect?
This is unused new old stock with intact markings and straight pins. Because internal specifications are proprietary, functional testing has not been performed; please inspect the photos and verify the part number against your requirements.
Every vintage control board has that one mysterious house-marked IC standing guard between power and logic. When the numbers match your schematic, you are one soldering session away from bringing dead hardware back to life.
